Heh - with all the cheap carbon imitation stuff being bought online right now, still the only bar/stem I've seen catastrophically fail in person was a Ritchey aluminum bar during a downtown crit. This was about 10 years ago btw, and I was later told it was due to some kind of corrosion that happens with aluminum on aluminum parts & sweat (I think). And that it has to be neglected for a while. Somebody here might know more about that type of corrosion. The guy did crash hard and break a collar bone.

It stuck with me enough that I started checking my gear, and I actually replaced a couple of bars/stems 'just cause' after a couple of years of use.